By applying the principles of ergonomics which of the following can be improved?
1. Designing of equipment and tools
2. Human efficiency
3. Layout of place of work
4. Reduction in industrial accidents
Select the correct answer using the code given below:
(a) 1, 2 and 3 only
(b) 1, 2, 3 and 4
(c) 2, 3 and 4 only
(d) 1, 3 and 4 only